/Engine/Source/Runtime/RHI/Public/DynamicRHI.h
Buffer Lock/Unlock.
virtual void * LockBuffer_BottomOfPipe ( class [FRHICommandListBase](API\Runtime\RHI\FRHICommandListBase) & RHICmdList, [FRHIBuffer](API\Runtime\RHI\FRHIBuffer) * Buffer, uint32 Offset, uint32 SizeRHI, EResourceLockMode LockMode )